Hose clamp



A ril 7, 1925.

M. MADSEN HOSE CLAMP FileQlJqly 1a, 1923 Iv-061750;": Mar-507M00371altm4 H- M A Zak-keys Patented Apr. 7, 1925.

n 'rras ATENT MARTIN HLADSEN, OF MONTEREY PARK, CALIFORNIA, ASSIGNOR OFONE-HALF TO PETER MADSEN, OF LUS AIIG'ELES, CALIFORNIA.

HOSE CLAMP.

I Application filed July 18,1923. Serial No. 652,298

To all whom it may concern:

Be it known that I, MARTIN MAnsnN, a citizen of the United States,residing at Monterey Park, in the county of Los Angeles, State ofCalifornia, have invented a new and useful Hose Clamp, of which thefollowing is a specification.

This invention relates to hose clamps which are suitable for employmentwith flexible fabric and fabric composition hose in which hi h pressuresare maintained.

A. very wide use of the invention is in the oil fields where water andmud is pumped under high pressure into the well being drilled, for thepurpose of providing circulation for mudding up the walls of the well.The pressures attained are very high especially in the drilling of adeep well, at times being above 1500 pounds per square inch.Considerable difficulty is experienced in holding the ends of the highpressure hose in the hose clamps which are employed for connectingbetween the stand pipe of the mud pump and the swivel of the drill stemthrough which the mud is induced in to the string of drill pipe. Thecommon type of clamp consists of a pair of cooperating members, havingcooperating semi-circular channels therein, which set over and areintended to clamp the hose tightly upon the coupling nipple. The naturalresult of this construction is the compression of the hose at twoopposite points, whereas the intermediate points between these diametralpoints of compression do not receive suflicient clamping pressure tohold them securely in place.

It is an object of the invention to provide a hose clamp which willclamp the hose with substantially equal pressure from all directions,thus accomplishing an eificient joinder between the hose and thecoupling.

It is a further object of the invention to provide a clamp of thischaracter which may be economically manufactured and which may be veryeasily applied upon the hose desired to be clamped upon a couplingnipple.

The especial advantages of the invention and further objects thereofwill be made evident hereinafter.

Referring tot-he drawing which is for illustrative purposes only:

Fig. 1 is a plan view partly in section, i1- lustrating the utility ofthe invention.

is to be applied.

Fig. 2 is a section taken on a plane represented by the line 2-2 of Fig.1.

Fig, 3 is an inside face View of one of the coupling plate members.

Fig. 4 is a perspective view of one of the clamp members employed in theinvention.

Fig. 5 is a diagram illustrating the relational movement between theclamp plates and the wedge members.

having threads 16 at the outer end thereof,

has been inserted. Centrally in the inner face of each clamp plate 11'is formed an arouated longitudinal depression 18 generated on a radiussubstantially the same as the radius of the hose to which theclamp Theextension of the are of the depression 18 is slightly less than aquarter circle, and when the plates 11 are placed together, thedepressions lS operate diametrically with respect to each other incompressing the hose ltagainst the nipple 15.

Adjacent to the arcuated depressions 18, and upon either side thereof,are formed plane faces 20 which extend the length of the plates 11 andare disposed at an angle of 45 degrees relative to the directionindicated by the arrow 21 in which the plates move and in whichdirection the pressure of the plates 11 is applied. Near the end of eachdiagonal face 20 a lateral key way'23 is formed into which keys 24formed upon the angular faces 25 of the wedge members 26 are received.The wedge members 26 are provided with arcuated interior faces 27 Iwhich are also slightly less than quarter circular extension. The faces25 of the wedges 26 are disposed perpendicularly to each other and restagainst the faces 20 of the clamp plates 11.

The action obtained by this construction results in an inward radialmovement of the wedges when the plates 11 are drawn together, and thefaces 20 and 25 are so disposed relative to the line of movement of theplates 11 that the inward movement of the wedges is substantially thesame as the inward movement of the plates 11. The diagram, Fig. 5, isexplanatory of this action.

Let it be considered that the face 20 is Lioved downwardly in thdirection of the arrow 30 to'the position indicated by the dotted line31; or in other words that the face 20 is moved downwardly through thedistance A. 32 represents any point in the face of the wedge membercooperating with the face 20'; this point is movable only in a directionperpendicular to the direction indicated by the arrow 30; that is tosay, the point 32 is movable along the lineX-Y. The engagement of the'iace 20 with the point forces the point in a leitw'ard'direction sothat when the face 20 has reached the position inijlicated by the dottedline 31, the point 82 is in the position indicated at 3 3, whichposition is distance B from the original position or? the point- 32.lVhen the faces are disposed an angle of 45 clegrees, the distances Aand B will be equal,

as will become evident in the comparison of these distances'in Fig. 5.

it is custoi'nary to 1310Y1ClQ1'lClgGS 35 on the nipples l5 andtherefore, corres nondin L L 7 "3 circular channels 3? are formed in thearcuatcd races 18 and 27 of the plates 11 and the wedges 26, into whichgrooves 37 the hose is'oepressed as shown in ig. l.

The clamp shown in the drawing and hereinbcfore described provides acompression of the hose against the nipple from four directions andaccomplishes this compression witliout sheariiig the surface structureof the hose as sometimes occurs when a pair oi semicircular clamps areemployed. The effect attained by the use of my invention is thesubstantial equal mnpression of the hose throughout its entirecircumference, without destr' ction oilthe hose structure due topinching.

I claim as my invention:

1. in a hose clamp, the combination of: a pair of oppositely disposedprimary members having aligning slots; means for drawing said primarymembers together; and oppositely disposed secondary members disposed ona plane substantially perpendicular to the direction of movement or saidprimary members, and arranged to be forced inwardly by said primarymembers, and keys formed on said secondary members adapted to cooperatewith said slots on said primary members for aligning said primary andsecondary members. 7

2. In a hose clamp, the combination of: pair of clamp plates oppositelydisposed and each having an inwardly disposed arcuated depression anddiagonal faces; there being slots in said diagonal faces; means fordrawing said clamp plates together and cooperative with said clampplates, a pair of oppositely disposed members having diagonal facesengaged by said diagonal faces oi. said clamp plates in a manner toforce said members inwardly when said clamp plates are drawn together,and keys formed on the diagonal faces of said cooperative members, saidkeys being arranged to engage with said slots for aligning said platesand said cooperative members.

3. In a hose clamp, t 1e combination of: a. air or oppositelydisposedprimary memers having aligning slots; means for drawing saidprin'iary members together; and 0p positely disposed secondary membersdisposed on a plane substantially perpendicular to the direction ofincrement of said primary members, and arranged to be forced inward lyby said primary members, and 'lieys formed on said secondary membersarranged to cooperate with saidsl-ots in said primary members foraligning said primary and secondary members.

lira hose clamp, theconlbination of: a pair of oppositely disposedprimary members; means for drawing said primary members together andoppositely disposed secondary members disposed on a plane substantiallyperpendicular to the direction of n'ioveinent or said primary members,and arranged to be forced inwardly by said primary men'ibers, therebeing interlocking engagement between said diagonal faces of said clampplates and said cooperative members for holding them in alignment.

In testimony whereof, I have hereunto ,set my hand at Los Angeles,California, this ?th day of July, 1923.

MARTIN hflrl-rDti JN.

